text/html; firefox --new-tab %s; nametemplate=%s.html; needsterminal;
text/html; w3m -I %{charset} -T text/html; copiousoutput;

# ##################################
# "There are two important parts here. First, the copiousoutput flag indicates that entry is a useful candidate for auto_view. 
# Second, the fact that there is another entry above it means that non-auto_view uses (e.g. viewing it as an attachment) 
# will try that first." 
# https://stackoverflow.com/questions/10902350/configuring-mutt-to-handle-the-same-attachment-differently-in-auto-view-than-in
#
# Note: the order is important here. In the example above if firefox is not placed first things won't work as intended.
# #################################
